[Droid Incredible Q&A, Help & Troubleshooting] demarcmj:
Well, I'll put my own experiences in now that a couple people have replied...

A couple days after posing the question, CyanogenMod decided to stop working for me (as others have noted that it tends to do after a period of time) so I decided to give some of these ICS ROMs a try since I was going to have to reflash anyway

I started with the Evervolv 2.1.0 Preview3 build posted on twitter so far [twitter.com]) because it was the first one to have camera support, which was one of the things keeping me from making the jump in the first place. The Evervolv build worked great for me. There was the occasional force close, but that is to be expected.

Then ics-deck-inc was updated to Alpha 4 yesterday to include, among other things camera support. I decided to move to deck since many people had noted that it was a bit better all-around than Evervolv. And now that it had camera support, there was no reason not to switch.

A few notes:

As awesomeo3000 pointed out, incredikernel is included. It's not the most up-to-date, but nobody has given any compelling reasons that you absolutely need the latest. (this was the case with Evervolv and OMX also)

I haven't really noticed a significant difference in battery life over my other ROMs, but that is probably because I am pretty much always around a charger so I don't really notice.

ics-deck comes with the Trebuchet (CM9) launcher, which is essentially stock ICS with some enhancements. It allows things like changing the # of homescreens, resizing any widget (stock only allows some), and other tweaks that are very useful but at the same time won't bother anyone who wants pure stock. Unfortunately, there seems to be two significant bugs in the app drawer in both the stock launcher and Trebuchet: (1) often times the next page of apps or widgets will show up in the background before you even attempt to switch pages, and (2) the launcher force closes very often when paging though the widgets. To alleviate that, I have switched to Nova Launcher which, like Trebuchet, is based on the stock ICS launcher but offers many helpful tweaks. I I still have had the occasional force close related to selecting widgets, but Nova also restores the long-press on the homescreen for widgets functionality, which can be used as another option if you experience force closes.

There are some small bugs that I have noticed here and there (like this one), but nothing really major, other than the well-known issues like calendar syncing and usb-host (see below). I also haven't yet tested a lot of things, like bluetooth for one.

My calendar syncing issues were solved by doing this: link. There was no need to replace the calender apps or anything like that. I can't speak for the Exchange Calendar syncing though. I can say that I was able to get an Exchange email account to work fine, but I don't use the calendar for that account.

As many people in the forums note, the multi-mount widget in the Android Market can be used to get usb-host support. Hopefully something will be built into the ROM in the future, but for now this should work. Alternatively, you can try what I use, the Samba Filesharing app. It's not as fast as USB, but wireless has it's own convenience advantages.

These are just some things I have noticed. There are some great features in ics-deck that I haven't even listed, and also some minor bugs. Alpha 5 is out now, only one day after Alpha 4, and I am excited to give it a try. I have to say that at this point I think they could drop the "Alpha." I think it could at the very least be considered "Beta" but that is just my opinion.

The important thing is this, anyone who is still using CM7 or any other ROM because they are waiting for an ICS ROM that is reasonably stable to use as a daily driver, I think ics-deck-inc has reached that point.